Combination fuse for projectiles



Saluti?I 16, 1930. A. F. TElTscHElD 1,775,660

Filed July 12, 1928 5140014450@ Alfred F- Tetsched attozvwaj Patentedy Sept. 16, 1930 'n-LFRE'D rll inni".isennin,Y or wriARToin-NEW JERSEY' f I f at . COMBINATION rusa son PROJECTILES iippiicafiqiitied my `12, i928. seriai Nassau/ i.

(GRA'NTniirNDEfRrH 'ser or M-acire, ieee,y As AMENDED Armi. so, 192s; 37o o. G. 757) AThe invention described herein, if patented, may be manufactured and used by or for the Governinentfor governmental purposes, without-the payment to me of any royalty thereon.

`The subject of this invention isa combi" nation fuse for projectiles.

yIn combination fuses which have a protruding'impact striker as shown in'Patent No 1 ,648,603, the' striker is normally partially extruded andfaccidental blows'received'there'- by v during storage,l shipment. and ,handling have sobent the striker'V that it has been impossibleJl to' movel it lto the inoperative position. y The present invention contemplates correction of' these disadvantages in Va novel manner whereby the striker i's utilized to retain both detonator carriersl of the fuse in the' unarmed position.v

The invention t insuring functioning of the delay action liring mechanism; to a new and desirable formv of plungerconstruction and to an arrangement of a rotor which, by the character of its mounting, will be retained in the armed position after impact.

Vith the foregoing and other objects in view, my invention resides in the novel arrangement and combination of parts and in the details of construction hereinafter described and claimed, it being understood thatl changes in the precise embodiment of the invention herein disclosed may be made within the scope of what is claimed without departing from the spirit of the invention.

A practical embodiment of the invention is illustrated in the accompanying drawing, wherein:

Fig. 1 is a longitudinal sectional view of a fuse constructed in accordance with the iiivention;

Fig. 2 is a fragmentary longitudinal sectional view takenthrough the plunger at right y angles to Fig. 1;

Fig. 3 is a sectional view on the line 3--3 of rig. i.

Referring to the drawings-by numerals of reference:

The fuse consists generally of a head 5 further relates to means Vfor venience of,manufacture,1is made in three A55' parts, namely anouter sleeve 7 whose outer end is inturned as at 8',.a base* 9k retained by the Aout'ersleeve 7 ,and an linner sleeve 10 whose upper end serves to limit inward movement of a striker head 11. A striker rod 12 tliread- 60 ed and'pinned to the head 11wis formed with a threaded port-ion- 13 land a firing pin '14'. The' threaded porti'oi'i 13 is adapted for engage ment withfa threaded aperture 15 inthe base 9V of vthe strikery casing-so as to retain the 65 striker `out of operation when instantaneous or quick Vaction of the fuse is not desired. rEhe striker may be held in its forward positionA against air pressureduring 'night by means offspring 16 which surrounds the ,rod 70 12 and is disposed within thestrikerc'asing. The fuse head 5 is formed in its rear end with a cavity 17 into which projectsthe stationaryfiring pin 18. Within the cavity is a plunger 19 normally retained on its seat at 75 the r'earend of the cavity by a pair of springs 20 disposedvin recesses 21 formed longitudinally of the plunger and preferably provided with guide thimbles 22. During 'assembling of the fuse, and before application'of the 80 fuse body,- the `plunger is maintained in its unarmed position in restraint against they action 'of the springs 2O by means of a bolt 23 which is secured in the fuse head'. and after being passed' through lan aperture in the 35 plunger receives a nut 24. 'Anape'rture 25 isVv formed axially of the plunger through which the tiring pin ltis adapted to pass, and a second apertureis formed ofi center for the reception of a primer detonator 26 90 and a delay element27, the flashl from which may pass through a duct 28'which opens at` the rear face of the plunger. vThe primer 26 is spaced from the forward base of the plunger so that with the fuse` unarmed the point of the stationary firing pin 18 may be inserted in an opening 29 in the plunger thus being assured of striking the primer and preventing rotational movement of the plunger during its forward di'splaeeiiient on impact.

The plunger is positively held in the unarmed position prior to use of the fuse by virtue of the engagement of the threaded portion 13 of the striker against its Vouter face and this engagement is maintained by a protective cap 30 threaded to the forward end of the outer sleeve 7 ofthe striker casing and restraining forward movement of the striker head 11 under the action of the spring 16. During assembling of the fuse the portion 13 limits movement of the plunger in the direction of arming and prevents accidental functioning of the delay mechanism.

The cap 30 is removed When the fuse is to be used and a centrifugally releasable pin 31 is employed in the customary manner to hold the plunger safe While the projectile is in the bore of the gun.

The fuse body 6 is provided With a cavity 32 preferably formed eccentrically-thereof for receiving a rpivoted rotor 33 carrying a primer detonator 34 and having a vrecess 35 Which is axially of the fuse When'the rotor is held in the unarmed position by a centrifugally releasable pin 36. When the fuse Yis assembled the rotor is separated from the plunger by a disk 37 centrallyapertured to permit passage of the firing pin which is held in the recess 35 to positively prevent arming of the rotor when the protective cap 30 is in place. `When the fuse is set to function through the striker rod the firing pin Will reenter the recess 35 on set-back.

The pivot 38 of the rotor is so placed that the rotor in moving to the armed position indicated in dotted lines in Fig. 3 is caused to bear tightly against the Wall of the fuse body as it is brought up against the stop pin 39. This provision is made for the purpose of establishing a sufficient restraint against the countermovement of the rotor onimpact to insure that the centrifugal pin 40 will have time to react and engage behind a Wing of the rotor. In order to permit tolerances in manufacture the pin 40 does notv necessarily engage the rotor in the unarmed position but it is in position to hold-the rotor unarmed in the event of failure of the pin 36.

The striker rod provides for quick action on impact when not threaded to its casing and when inoperative by being threaded to the casing a delay firing action Will occur when the inertia plunger moves forward to bring the primer 26 into contact With the stationary firing pin 18.

I claim:

1. In a combination fuse, a normally unarmed inertia plunger carrying an element of a delay firing mechanism, a normally unarmed detonator carrier in rear of the plunger, an impact striker passing through the plunger to the detonator carrier and when in the red position opposing movement of the plunger and carrier to armed position and a removable cap on the nose of the fuse for holding the striker in the fired position.

2. In a combination fuse, a normally unarmed inertia plunger carrying an element of a delay firing mechanism, a normally unarmed detonator carrier in rear of the plunger, an impact striker'passing through the plunger to the detonator carrier and when in the fired position opposing movement of the plunger to armed position and a removable cap on the nose of the fuse for holding the striker in the fired position.

3. In a combination fuse, a normally unarmed inertia plunger carrying an element of a delay firing mechanism, a` normally unarmed detonatorcarrier in rear of the plunger, an impact striker passing through the plunger to the detonator carrier and When in the fired position opposing movement of the carrier to armed position and a removable cap on the nose of the fuse for holding the striker in the fired position. l

l. In a combination fuse, an instantaneous and a delay action firing mechanism including normally unarmed movable detonat'or carriers and a removable means-for securing an element of the instantaneous firing mechanism in position to oppose movement ofthe detonating carriers out of unarmed position.

5. In a fuse, a normally unarmed detonator carrier, a firing pin and removable means for securing the firing pin in posit-ion to oppose movement of the-detonator out of unarmed position.

6. In a fuse, a housing, a plunger in the housing, a primer carrier eccentrically by the plunger and intermediate its end faces and a firing pin fixed in the housing and vextending' into the plunger in line With the primer When the plunger is in` unarmed position.

ALFRED F. TEITSCHEID. 

